"Generated by" header insertion algorithm needs love #44 - #52

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-java@v3, actions/upload-artifact@v4, stCarolas/setup-maven@v4.5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

setup-java v3 is deprecated and will no longer receive updates. Please migrate to actions/setup-java@v5.